Improvement in machines for helically creasing sheet-metal pipes



UNITED STATES PATENTr OFFICE.

ALFRED B. SEYh-IOUR, OF OLAVERAOK, NEV YORK.

Specification forming part of Letters Patent No. 12,971, dated May 29,ISST).

To @ZZ '107mm t may concern: Beit known that I, ALFRED B. SEYMOUR,

Y of Claverack, Columbia county, New York,

have invented a new and useful improvement in the manufacture ofstove-pipes by means of an improved machine herein described; and Ihereby declare that the following is a full and exact description.

To enable others to make and use my invention, I proceed to describe itsconstruction and operation, reference being had to the drawings hereuntoannexed, and making part of this specication.

Figure l is a front elevation of the machine. Fig. 2 is a frontelevation. Fig. 3 is a birdseye View. Fig. et shows the gage-plate enlarged; Fig. 5, the saine-an edge view. A

The construction of my spiral sWaging-Inachine consists in combiningwith the sWageA a gage-plate, B, and different sizes of screws D, (withgages,) to cause the swages to move nearer `to the gage-p1ate in formingthe screw.

The article to be made is generally stovepipe With'screW-joints.

This machine can beset for as many sizes of pipe as there are screws D,with their corresponding gages, E.

Upon the top edge of the gage-plate (see Fig. 5) there is a finger orindicator, F, upon which a scale is 'marked By turning 'the thu1nb-screwGthe gage is set at any angle required, the scale marked and numberedupon the indicator being the guide for the operator. lVhen thegage-plate is set, it is required to set the gage E in the proper screwD, the screws D being linade fine or coarse, according to the size ofpipe to be made. When both are setto correspond, the pipe is swaged inthe ordinary manner of swaging; but the effect produced is different, aspiral being formed by the sWaging-rollcrs being moved up toward thegage-plate. The frame of the machine should be of iron, and of anyforrn.

The parts of the machine-not niinutely described are like correspondingparts in ordinary sWaging-niachines. 4

lVhat I claim as niyinvention, and desire to secure by Letters Patent,is*

The plate B (having a gage) between the shafts of the creasing-rollers,and adjusted by a set-screrv,-so that the proper inclination may begiven to the end of the pipe.

ALFRED B. SEYMOUR.

lVitnesses:

OWEN G. VARREN, I. S. SEYMOUR.

